Answer:
Fossil record, history of life as documented by fossils, the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock. Their ages can be established by comparing the fossils in each layer.
The answer should be letter B I'm sorry if not
Answer:
Cells
Explanation:
Cells are the basic unit and structure of all living things;everything starts from cells for living things.
I believe the answer you're looking for is Evolution.
